Add Dart 2.10 annotations to the web engine sources (#20019)

lib/web_ui/lib/src/engine.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 @JS()
 library engine;
 

lib/web_ui/lib/src/engine/alarm_clock.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// A function that returns current system time.

lib/web_ui/lib/src/engine/assets.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// This class downloads assets over the network.

lib/web_ui/lib/src/engine/bitmap_canvas.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// A raw HTML canvas that is directly written to.

lib/web_ui/lib/src/engine/browser_detection.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// The HTML engine used by the current browser.

lib/web_ui/lib/src/engine/browser_location.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 // TODO(mdebbar): add other strategies.

lib/web_ui/lib/src/engine/canvas_pool.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Allocates and caches 0 or more canvas(s) for [BitmapCanvas].

lib/web_ui/lib/src/engine/clipboard.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Handles clipboard related platform messages.

lib/web_ui/lib/src/engine/color_filter.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A description of a color filter to apply when drawing a shape or compositing

lib/web_ui/lib/src/engine/compositor/canvas.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// A Dart wrapper around Skia's SKCanvas.

lib/web_ui/lib/src/engine/compositor/canvas_kit_canvas.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// An implementation of [ui.Canvas] that is backed by a CanvasKit canvas.

lib/web_ui/lib/src/engine/compositor/canvaskit_api.dart

@@ -6,6 +6,8 @@
 ///
 /// Prefer keeping the originl CanvasKit names so it is easier to locate
 /// the API behind these bindings in the Skia source code.
+
+// @dart = 2.10
 part of engine;
 
 /// Entrypoint into the CanvasKit API.

lib/web_ui/lib/src/engine/compositor/color_filter.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A [ui.ColorFilter] backed by Skia's [CkColorFilter].

lib/web_ui/lib/src/engine/compositor/embedded_views.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// This composites HTML views into the [ui.Scene].

lib/web_ui/lib/src/engine/compositor/fonts.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 // This URL was found by using the Google Fonts Developer API to find the URL

lib/web_ui/lib/src/engine/compositor/image.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Instantiates a [ui.Codec] backed by an `SkImage` from Skia.

lib/web_ui/lib/src/engine/compositor/image_filter.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// The CanvasKit implementation of [ui.ImageFilter].

lib/web_ui/lib/src/engine/compositor/initialization.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// EXPERIMENTAL: Enable the Skia-based rendering backend.

lib/web_ui/lib/src/engine/compositor/layer.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A layer to be composed into a scene.

lib/web_ui/lib/src/engine/compositor/layer_scene_builder.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 class LayerScene implements ui.Scene {

lib/web_ui/lib/src/engine/compositor/layer_tree.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A tree of [Layer]s that, together with a [Size] compose a frame.

lib/web_ui/lib/src/engine/compositor/mask_filter.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// The CanvasKit implementation of [ui.MaskFilter].

lib/web_ui/lib/src/engine/compositor/n_way_canvas.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A virtual canvas that applies operations to multiple canvases at once.

lib/web_ui/lib/src/engine/compositor/painting.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// The implementation of [ui.Paint] used by the CanvasKit backend.

lib/web_ui/lib/src/engine/compositor/path.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// An implementation of [ui.Path] which is backed by an `SkPath`.

lib/web_ui/lib/src/engine/compositor/path_metrics.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 class CkPathMetrics extends IterableBase<ui.PathMetric>

lib/web_ui/lib/src/engine/compositor/picture.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 class CkPicture implements ui.Picture {

lib/web_ui/lib/src/engine/compositor/picture_recorder.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 class CkPictureRecorder implements ui.PictureRecorder {

lib/web_ui/lib/src/engine/compositor/platform_message.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 class PlatformMessage {

lib/web_ui/lib/src/engine/compositor/raster_cache.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A cache of [Picture]s that have already been rasterized.

lib/web_ui/lib/src/engine/compositor/rasterizer.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A class that can rasterize [LayerTree]s into a given [Surface].

lib/web_ui/lib/src/engine/compositor/skia_object_cache.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// A cache of Skia objects whose memory Flutter manages.

lib/web_ui/lib/src/engine/compositor/surface.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 typedef SubmitCallback = bool Function(SurfaceFrame, CkCanvas);

lib/web_ui/lib/src/engine/compositor/text.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 class CkParagraphStyle implements ui.ParagraphStyle {

lib/web_ui/lib/src/engine/compositor/util.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// An error related to the CanvasKit rendering backend.

lib/web_ui/lib/src/engine/compositor/vertices.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 class CkVertices implements ui.Vertices {

lib/web_ui/lib/src/engine/compositor/viewport_metrics.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 class ViewportMetrics {

lib/web_ui/lib/src/engine/dom_canvas.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A canvas that renders to DOM elements and CSS properties.

lib/web_ui/lib/src/engine/dom_renderer.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 class DomRenderer {

lib/web_ui/lib/src/engine/engine_canvas.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Defines canvas interface common across canvases that the [SceneBuilder]

lib/web_ui/lib/src/engine/frame_reference.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A monotonically increasing frame number being rendered.

lib/web_ui/lib/src/engine/history.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 const MethodCall _popRouteMethodCall = MethodCall('popRoute');

lib/web_ui/lib/src/engine/houdini_canvas.dart

@@ -8,6 +8,7 @@
 // - evaluate using stylesheets for static CSS properties
 // - evaluate reusing houdini canvases
 
+// @dart = 2.10
 part of engine;
 
 /// A canvas that renders to a combination of HTML DOM and CSS Custom Paint API.

lib/web_ui/lib/src/engine/html_image_codec.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 final bool _supportsDecode = js_util.getProperty(

lib/web_ui/lib/src/engine/keyboard.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// After a keydown is received, this is the duration we wait for a repeat event

lib/web_ui/lib/src/engine/mouse_cursor.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Provides mouse cursor bindings, such as the `flutter/mousecursor` channel.

lib/web_ui/lib/src/engine/onscreen_logging.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 html.Element? _logElement;

lib/web_ui/lib/src/engine/picture.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// An implementation of [ui.PictureRecorder] backed by a [RecordingCanvas].

lib/web_ui/lib/src/engine/platform_views.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 // TODO(yjbanov): The code in this file was temporarily moved to lib/web_ui/lib/ui.dart

lib/web_ui/lib/src/engine/plugins.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 Future<void> Function(String, ByteData?, ui.PlatformMessageResponseCallback?)? pluginMessageCallHandler;

lib/web_ui/lib/src/engine/pointer_binding.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Set this flag to true to see all the fired events in the console.

lib/web_ui/lib/src/engine/pointer_converter.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 class _PointerState {

lib/web_ui/lib/src/engine/profiler.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A function that receives a benchmark [value] labeleb by [name].

lib/web_ui/lib/src/engine/rrect_renderer.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Renders an RRect using path primitives.

lib/web_ui/lib/src/engine/semantics/accessibility.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Singleton for accessing accessibility announcements from the platform.

lib/web_ui/lib/src/engine/semantics/checkable.dart

@@ -11,7 +11,7 @@
 //                framework. Currently the framework does not report the
 //                grouping of radio buttons.
 
-
+// @dart = 2.10
 part of engine;
 
 /// The specific type of checkable control.

lib/web_ui/lib/src/engine/semantics/image.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Represents semantic objects that deliver information in a visual manner.

lib/web_ui/lib/src/engine/semantics/incrementable.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Adds increment/decrement event handling to a semantics object.

lib/web_ui/lib/src/engine/semantics/label_and_value.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Renders [_label] and [_value] to the semantics DOM.

lib/web_ui/lib/src/engine/semantics/live_region.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Manages semantics configurations that represent live regions.

lib/web_ui/lib/src/engine/semantics/scrollable.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Implements vertical and horizontal scrolling functionality for semantics

lib/web_ui/lib/src/engine/semantics/semantics.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Set this flag to `true` to cause the engine to visualize the semantics tree

lib/web_ui/lib/src/engine/semantics/semantics_helper.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// The maximum [semanticsActivationAttempts] before we give up waiting for

lib/web_ui/lib/src/engine/semantics/tappable.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Listens to HTML "click" gestures detected by the browser.

lib/web_ui/lib/src/engine/semantics/text_field.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Text editing used by accesibility mode.

lib/web_ui/lib/src/engine/services/buffers.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 abstract class _TypedDataBuffer<E> extends ListBase<E> {

lib/web_ui/lib/src/engine/services/message_codec.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A message encoding/decoding mechanism.

lib/web_ui/lib/src/engine/services/message_codecs.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// [MessageCodec] with unencoded binary messages represented using [ByteData].

lib/web_ui/lib/src/engine/services/serialization.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Write-only buffer for incrementally building a [ByteData] instance.

lib/web_ui/lib/src/engine/shader.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 bool _offsetIsValid(ui.Offset offset) {

lib/web_ui/lib/src/engine/shadow.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// How far is the light source from the surface of the UI.

lib/web_ui/lib/src/engine/surface/backdrop_filter.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A surface that applies an image filter to background.

lib/web_ui/lib/src/engine/surface/canvas.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 class SurfaceCanvas implements ui.Canvas {

lib/web_ui/lib/src/engine/surface/clip.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Mixin used by surfaces that clip their contents using an overflowing DOM

lib/web_ui/lib/src/engine/surface/debug_canvas_reuse_overlay.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 html.HtmlElement _createContainer() {

lib/web_ui/lib/src/engine/surface/image_filter.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A surface that applies an [imageFilter] to its children.

lib/web_ui/lib/src/engine/surface/offset.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A surface that translates its children using CSS transform and translate.

lib/web_ui/lib/src/engine/surface/opacity.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A surface that makes its children transparent.

lib/web_ui/lib/src/engine/surface/painting.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Implementation of [ui.Paint] used by the HTML rendering backend.

lib/web_ui/lib/src/engine/surface/path/conic.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Converts conic curve to a list of quadratic curves for rendering on

lib/web_ui/lib/src/engine/surface/path/cubic.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Chops cubic at Y extrema points and writes result to [dest].

lib/web_ui/lib/src/engine/surface/path/path.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// A complex, one-dimensional subset of a plane.

lib/web_ui/lib/src/engine/surface/path/path_metrics.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 const double kEpsilon = 0.000000001;

lib/web_ui/lib/src/engine/surface/path/path_ref.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Stores the path verbs, points and conic weights.

lib/web_ui/lib/src/engine/surface/path/path_to_svg.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Converts [path] to SVG path syntax to be used as "d" attribute in path

lib/web_ui/lib/src/engine/surface/path/path_utils.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Mask used to keep track of types of verbs used in a path segment.

lib/web_ui/lib/src/engine/surface/path/path_windings.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Computes winding number and onCurveCount for a path and point.

lib/web_ui/lib/src/engine/surface/path/tangent.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Computes tangent at point x,y on a line.

lib/web_ui/lib/src/engine/surface/picture.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 // TODO(yjbanov): this is currently very naive. We probably want to cache

lib/web_ui/lib/src/engine/surface/platform_view.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// A surface containing a platform view, which is an HTML element.

lib/web_ui/lib/src/engine/surface/recording_canvas.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// Enable this to print every command applied by a canvas.

lib/web_ui/lib/src/engine/surface/render_vertices.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 _GlRenderer? _glRenderer;

lib/web_ui/lib/src/engine/surface/scene.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 class SurfaceScene implements ui.Scene {

lib/web_ui/lib/src/engine/surface/scene_builder.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 class SurfaceSceneBuilder implements ui.SceneBuilder {

lib/web_ui/lib/src/engine/surface/surface.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 /// When `true` prints statistics about what happened to the surface tree when

lib/web_ui/lib/src/engine/surface/surface_stats.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// Surfaces that were retained this frame.

lib/web_ui/lib/src/engine/surface/transform.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.10
 part of engine;
 
 /// A surface that transforms its children using CSS transform.

lib/web_ui/lib/src/engine/test_embedding.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 const bool _debugLogHistoryActions = false;

lib/web_ui/lib/src/engine/text/font_collection.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+// @dart = 2.10
 part of engine;
 
 const String _ahemFontFamily = 'Ahem';

lib/web_ui/lib/src/engine/text/line_break_properties.dart

@@ -12,6 +12,7 @@
 // # Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the U.S. and other countries.
 // # For terms of use, see http://www.unicode.org/terms_of_use.html
 
+// @dart = 2.10
 part of engine;
 
 /// For an explanation of these enum values, see: